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- W3025559626 abstract "Regional oxygen saturation (rSO2) monitoring of the brain by near-infrared spectroscopy (NIRS) has been mainly used during carotid endarterectomy. The present study was conducted in volunteers and investigates the rSO2 values of the brain, heart and liver tissue as assessed by NIRS in the supine and the sitting position.After obtaining written informed consent from forty-nine healthy volunteers, rSO2 values were recorded in the heart and liver areas in the supine and the sitting position, while simultaneously the rSO2 values of the brain.The rSO2 brain values in the supine and the sitting position were 69 ± 6.0 and 66 ± 6.1 respectively (p = 0.0001). The rSO2 values in the supine and the sitting position were 76 ± 10.5 and 79 ± 6.7 for the heart (p > 0.05) and 85 ± 6.8 and 82 ± 7.2 for the liver, (p = 0.007). Heart rSO2 values were higher than the brain rSO2 values in both the supine (76 ± 10.4 versus 69 ± 6.6; p = 0.0001) and the sitting position (79 ± 6.7 versus 66 ± 6.1; p = 0.0001). The liver rSO2 values were also higher than the brain rSO2 values in the supine (85 ± 6.8 versus 69 ± 6.0; p = 0.0001) and in the sitting position (82 ± 7.2 versus 66 ± 5.7; p = 0.0001). Arterial blood pressure and arterial oxygen saturation (SpO2) did not differ between the two positions but the heart rate was higher in the sitting position (p = 0.030).We conclude that brain and liver (but not heart) rSO2 values are higher in the supine than sitting position. Additionally, NIRS may be used to assess oxygenation of the heart and liver." @default.
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- W3025559626 date "2017-09-15" @default.
- W3025559626 modified "2023-09-27" @default.
- W3025559626 title "Measurements of oxygen saturation of brain, liver and heart areas in the supine and sitting position using near infrared spectrophotometry" @default.
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- W3025559626 doi "https://doi.org/10.21454/rjaic.7518.242.fss" @default.
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